Hydraulic valve.



PATENTBD JUNE s, 190s.

C. L. TAYLOR. HYDRAULIC VALVE.

APPLIoATmu FILED 111111.29. 1905.

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No.v 891,964. PATENTED JUNE 30, 1908.

` G. L. TAYLOR.

HYDRAULIC VALVE.

APPLICATION FILED MAR. 29. 190i?.

2 SHEETS-SHEET 2 it the upper end of the bore 4.

. UNITED STATES PATENT OFFICE.

CLARENCE L. TAYLOR, OF ALLIANCE, OHIO, ASSIGNOR TO THE MORGAN ENGINEERING COMPANY, OF ALLIANCE, OHIO.

HYDRAULIC VALVE.

Specification of Letters Patent.

Patented .Tune 30, 1908.

Application led. March 29, 1905. Serial No. 252,741.

T o all whom it may concern: l

Be it known that I, CLARENCE L. TAYLOR, of Alliance, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Hydraulic Valves; and I do hereby declare the following to be a full, clear, and exact description oi the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in hydraulic valves, designed particularly for use with water under high pressure, the object being to provide positive means for preventing the escape of any water from the machine, or to the exhaust, until the port or passage from the accumulator or other source of pressure supply has been completely out oft', thus preventing the unnecessary waste of any power.

A further object is to so arrange and construct the two piston valves and their actuating mechanism that when one valve is moved the other will be at rest, thus reducing the wear o n the packing cups.

With these ends in view my invention consists in the parts and combination of parts as will be more fully described and pointed out in the claims.

In Athe accompanying drawings, Figure 1 is a view in section through the valve. Fig. 2 is a view in end elevation. Fig. 3 is an end i view and Fig. 4 a plan view of Fig. 2.

1 represents the valve casing provided with the inlet 'passage 2 which latter is in communication with the pipe 3 leading from an accumulator or other source of power. Inlet passage 2 communicates in the usual manner with the cylindrical bore 4 in which the inlet iston valve 5 rests and moves. This cylin- C rical bore 4 extends through the valve casing 1, and is provided below the water inlet opening with an outlet 7, which communi- Cates with the exhaust passage through opening 21 and with port or opening 8, leading to the machine.

The valve 5 comprises a stem 9 carrying the spools or sleeves 10 and 11 and the cup packings 12, 12a and 12D the spools or sleeves and the packin r being held in place between the head 13 and` the nut 14. The head 13 is constructed to normally rest on the top of easing 1, as shown in Fig. 1, and is provided with a reduced neck 15 designed to snugly The cup packings 12a and 12b which embrace the opposite ends of sleeve or spool 11, normally rest on opposite sides of the inlet opening to the bore, consequently when the valve is closed, as shown in Fig. 1, it is balanced, and when the valve is in its closed position, cup packing 12L rests immediately above the outlet opening 7 while the packing 12 rests a considerable distance below it.

It will now be seen that by raising the piston valve 5, the cup packing 12il will be elevated above the inlet opening and acking 12 elevated to a position near but be ow the outlet passage, thus permitting the water to pass from passage 2 into the bore between cup packings 12a and 12 and out through outlet 7 to the opening 8 which communicates with the machine, the valve`5 at all times and in all positions being perfectly balanced.

The exhaust valve 16 is identical in construction with the inlet valve, and comprises a stem 17 carrying the spools or sleeves 18 and 19 and cup paekings 20, 20l and 20h. When the valve 16 is at rest and closed as in Fig. 1, and the valve 5 open, the water under pressure has free ingress to the space between cu packings 20rL and 20b and consequently ba ances the valve. When the valve is moved upwardly, cup packing 20L is carried above the inlet passage 21 thus permitting the water from the machine to pass out through the exhaust passage 22 and pipe 23.

The two valves 5 and 16 are located on opposite sides ol` the passage leading to the erating lever 26, which is provided at its lower end, below its fulcrum with two rollers 27, one for each hook. When. the lever is in its upright position both valves are in their closed positions. If now the lever 26 be moved to the right, the roller 27 engaging the hook of the exhaust valve 16, will pass out of said hook thus leaving the exhaust valve at rest, while the other rollerV will engage the hook of the pressure valve 5 and elevate same thus permitting the water under pressure to pass to the machine. As the roller 27 moves out of engagement with the hook of' the exhaust valve it travels over and in eontact with the inclined surface 29 or the top of the head 13 of the valve and holds the valve ICO iirmly in its closed position.` By Vnow moving the lever 26 to its upright position the pressure valve will be closed andthe Water admitted to the machine will be confined there. By now reversing the direction of movement of lever 26, theroller 27 in the hook of the pressure valve will pass out of the latter and engage its curved surface 29 on the head of the valve, while the other roller will enter and engage the hook on the exhaust valve thus elevating the latter and permitting the water coniined in the machine to escape.

The lever 26 is provided with two shoulders 28 which are designed when the lever is moved, to engage the tops of the hooks and act as a positive stop or limit to the angular movement of said lever and also prevent any accidental movement of the closed valve.

With this construction it will be seen that when one valve is engaged by the lever, the other will be disengaged from the lifting mechanism of the lever, hence the valves move one at a time, consequently there is much less wear on the cup paclings than there would be if the valves were coupled to move in unison. Again with my improved construction only one valve can be open at a time, and when one is open, the roller 27 on the lever bearing on the curved path 29 positively holds the latter in its closed position.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of my invention hence I would have it understood that I do not wish to restrict myself to the exact construction of parts shown and described, but,

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

l. In a hydraulic valve, the combination with a casing having an inlet port, anY exhaust port, and a port intermediate the inlet and exhaust ports leading to the machine or motor, and two balanced piston valves for controlling the supply and exhaust of fluid through said ports, of a slotted valve stem for each valve, and a lever provided with a bearing for each stem and adapted to actuate said valves independently and prevent simultaneous movement of both valves.

2. In a hydraulic valve, the combination with a casing having inlet and exhaust passages, two balanced valves one controlling the supply and the other the exhaust, each valve having a hook shaped upper end rigid therewith, and a port intermediate the valves, and in communication with the inlet and exhaust passages and adapted to be connected to the machine or motor, of a pivoted lever adapted when rocked to engage one hook and be `disengaged from the other, and provided with a shoulder adapted to bear on the disengaged hook and positively hold its valve in closed position.

3. In a hydraulic valve the combination With a single casing having an inlet passage, an exhaust passage, an intermediatepassage leading to the machine and communicating with the inlet and exhaust passage, and two balanced piston valves located within said casing on opposite sides of the passage leading to the machine, one of said valves controlling the inlet passage and the other the exhaust, of means for engaging and actuating the valves, one at a time, whereby when one valve is moved, the other remains closed and at rest.

4. In a hydraulic valve the combination with a casing having an inlet passage, an exhaust passage, an intermediate port leading to the machine, and passages leading from the inlet and exhaust passages to said port, and two valves one controlling the inlet and the other the exhaust, each valve having a hook at its upper end, of a lever having means for engaging the hooks, one at a time, whereby when one hook is engaged and elevated by the lever, the other will be disengaged, and means on the lever for engaging the top of the disengaged hook for holding its valve in closed position.

5. In .a hydraulic valve, the combination with a casing having inlet and exhaust passages therein, a passage or port leading to the machine and communicating with the inlet and exhaust passages, and a valve for controlling the exhaust, and a valve for controlling the supply, mounted in said casing, each valve having a rigid hook shaped upper end and a curved shoulder at the base of the hook,l of a lever pivoted to the casing intermediate the hooks, and adapted when tilted to engage and lift one hook and its attached valve, and move in contact with the curved shoulder of the other valve.

In testimony whereof, I have signed this speciiication in the presence of two subscribing Witnesses.

CLARENCE L. TAYLOR..

Witnesses:

A. L. ROBERTS,

N. C. FETTERS. 

